7800 may refer to:
Technology Atari 7800, a third-generation video game console GeForce 7800 series, a line of graphics processing units from Nvidia Radeon HD 7800 series, a line of graphics processing units from AMD released 2012 Radeon RX 7800 XT, a graphics processing unit from AMD released 2023
Other 7800, the 800th year of the 8th millennium NGC 7800, an irregular galaxy in the Pegasus constellation PCC 7800, a streetcar type
See also 7800 series